Sedimentation velocity of morphologically diverse macrophytes and plastic particles@en

The dataset contains sedimentation velocity measurements for 22 morphologically diverse macroalgae species (n = 49), the seagrass Zostera marina (n = 3), and plastic particles of four distinct shapes (n = 16). Each sample was measured at least five times, with some measured up to seven times. Detailed morphological descriptions and images are available in the corresponding paper. Samples with a SampleID starting with \"K\" were collected in January 2023 from the Kiel Fjord, Germany (between Strande and Bülk light house, 54°26'57.4N 10°11'37.6E). U. gigantea was collected in June 2024 in Yerseke, Netherlands (51°30'09.0N, 4°02'39.7E). All other samples were collected in June 2024 at the same site from the Kiel Fjord as in 2023, as well as two additional locations (Schilksee, 54°25'16.3N 10°10'43.1E and Mönkeberg, 54°21'20.92N 10°10'41.97E). Sedimentation velocity measurements were conducted in plastic cylinders, allowing particles to sink 15 cm to reach their terminal sinking velocity before starting the measurements. The sinking time was recorded using a stopwatch, and sedimentation velocity was calculated by dividing the sinking distance by the elapsed time. Test with varying cylinder heights showed no significant differences in results. […]本数据集包含22种形态多样的大型藻类（n=49）、海草大叶藻（Zostera marina，n=3）以及四种不同形状的塑料颗粒（n=16）的沉降速度测量数据。所有样本均至少测量5次，部分样本最多测量7次。详细的形态学描述与图像可参见对应研究论文。 样本ID以"K"开头的样本于2023年1月采集自德国基尔峡湾（位于斯特朗德与比尔克灯塔之间，北纬54°26'57.4N，东经10°11'37.6E）。巨藻（U. gigantea）于2024年6月采集自荷兰耶尔瑟克（北纬51°30'09.0N，东经4°02'39.7E）。其余所有样本均于2024年6月采集自2023年的基尔峡湾采样点位，以及另外两个补充采样点：席尔克塞（北纬54°25'16.3N，东经10°10'43.1E）和蒙克贝格（北纬54°21'20.92N，东经10°10'41.97E）。 沉降速度测量在塑料圆柱筒中开展：待颗粒沉降15厘米达到终端沉降速度后，再启动测量流程。使用秒表记录沉降耗时，通过沉降距离除以总耗时计算沉降速度。针对不同圆柱筒高度的对照实验表明，测量结果无显著差异。[...]